Self-adjusting cable rod seal

Abstract

A self-adjusting wear resistant seal assembly is provided for a cable rod slidably positioned within a cable conduit. A continuous polyethylene collar is radially compressed in close clearance around the rod by an elastomeric seal which embraces the end portion of the conduit and the collar and holds a flange on the collar against the end portion of the conduit. An integral lip on the seal engages the rod to provide a redundant seal. Corresponding serrations on the conduit and seal cooperate to secure the seal to the rod. A tapered lip may also be provided on the collar for engagement with the rod.

What is claimed is: 
     
       1. A self-adjusting cable rod seal adapted to be mounted on a cable conduit having a cable rod slidably positioned therein comprising a bearing collar having a long axial portion disposed in close clearance around the rod and terminating inwardly in a radially extending flange, and   a resilient seal having an end wall overlying said flange and axially restrained to hold the flange against the end portion of the conduit, said wall having an axial bore radially compressing the axial portion of the collar disposed therein toward the rod.   
     
     
       2. The apparatus of claim 1 wherein the resilient seal embraces the end portion of the conduit. 
     
     
       3. The apparatus of claim 1 wherein the axial portion of the bearing collar is continuously disposed in close clearance around the rod. 
     
     
       4. The apparatus of claim 1 wherein the collar is formed of a thermoplastic polymeric material. 
     
     
       5. The apparatus of claim 1 wherein the seal is formed of an elastomeric material. 
     
     
       6. The apparatus of claim 1 wheren the seal is formed of an elastomeric material and the collar is formed of a thermoplastic polymeric material. 
     
     
       7. The apparatus of claim 1 further comprising an annular lip on the resilient seal which extends outwardly at an angle beyond the collar and terminates in touching relationship with the rod. 
     
     
       8. The apparatus of claim 2 wherein the resilient seal is provided with a sidewall having serrations adapted to cooperate with corresponding serrations on the end portion of the conduit for securing the seal to the conduit. 
     
     
       9. The apparatus of claim 4 wherein the collar is formed of polyethylene. 
     
     
       10. The apparatus of claim 6 wherein the collar is formed of polyethylene. 
     
     
       11. The apparatus of claim 7 wherein the annular lip is formed integrally with the seal. 
     
     
       12. A self-adjusting cable rod seal adapted to be mounted on a cable conduit having a cable rod slidably positioned therein comprising a bearing collar having a long axial portion terminating axially inwardly in a radially outwardly extending flange and terminating axially outwardly in a relatively small radially-inwardly projecting lip disposed in close clearance around the rod, and   a resilient seal having an end wall overlying said flange and axially restrained to hold the flange against the end portion of the conduit, said wall having an axial bore radially compressing the axial portions and lip portions of the collar disposed therein toward the rod.   
     
     
       13. The apparatus of claim 12 wherein the lip is radially internally tapered with its axially outward end of larger diameter than its axially inward end. 
     
     
       14. The apparatus of claim 12 further comprising an annular lip on the resilient seal which extends axially outwardly at an angle beyond the collar and terminates in touching relationship with the rod. 
     
     
       15. The apparatus of claim 12 wherein the resilient seal embraces the end portion of the conduit. 
     
     
       16. The apparatus of claim 12 wherein the lip portion of the bearing collar is continuously disposed in close clearance around the rod. 
     
     
       17. The apparatus of claim 12 wherein the seal is formed of an elastomeric material and the collar is formed of a thermoplastic polymeric material. 
     
     
       18. The apparatus of claim 15 wherein the resilient seal is provided with a sidewall having serrations adapted to cooperate with corresponding serrations on the end portion of the conduit for securing the seal to the conduit. 
     
     
       19. The apparatus of claim 14 wherein the annular lip on the seal is formed integrally with the seal. 
     
     
       20. A self adjusting cable rod seal adapted to be mounted on a cable conduit having a cable rod slidably positioned therein comprising a bearing collar having a long axial portion disposed in close clearance around the rod and terminating inwardly in a radially extending flange, and   a resilient seal having an end wall overlying said flange and axially restrained to prevent axial movement of the flange, said wall having an axial bore radially compressing the axial portion of the collar disposed therein toward the rod.   
     
     
       21. A self adjusting cable rod seal adapted to be mounted on a cable conduit having a cable rod slidably positioned therein comprising a bearing collar having a long axial portion terminating axially inwardly in a radially outwardly extending flange and terminating axially outwardly in a relatively small radially inwardly projecting lip disposed in close clearance around the rod, and   a resilient seal having an end wall overlying said flange and axially restrained to prevent axial movement of flange, said wall having an axial bore radially compressing the axial portions and lip portions of the collar disposed therein toward the rod.